药渣热解过程NO_x前驱物生成特征及规律研究

发布时间：2018-02-21 18:07

本文关键词： 凉茶药渣青霉素药渣 NOx前驱物热解 NH 总产率　出处：《燃料化学学报》2017年03期 　论文类型：期刊论文

【摘要】：以凉茶药渣(HTW)和青霉素菌渣(PMW)为对象,结合热重(TGA)和X射线光电子能谱(XPS)表征,在水平管式反应器上对比研究了热解NO_x前驱物的生成特征,考察了热力因素和燃料理化特性的影响。结果表明,蛋白质N为主要原料N结构,HTW占全部,PMW超过80%,决定了主导NO_x前驱物为NH_3;热力因素不改变此主导性,但会影响前驱物生成路径,改变组分比例及总产率,其强弱顺序为:高温快速高温慢速低温快速≈低温慢速;基于高温快速热解,大粒径和低含水率可分别降低总产率5%-11%和4%-6%;燃料组分影响NH_3产率,低温或慢速下,N结构差别使PMWHTW;高温快速下,灰分元素差异使PMWHTW;半焦N结构及N分布表明,典型热解条件下总产率为20%-45%,与药渣种类无关,可为其清洁利用提供参考。
[Abstract]:The formation characteristics of pyrolytic NO_x precursors were studied in a horizontal tubular reactor with the characteristics of thermogravimetric TGA) and X-ray photoelectron spectroscopy (XPS). The effects of thermodynamic factors and physicochemical properties of fuel were investigated. The results showed that protein N as the main raw material N accounted for more than 80% of the total PMW, which determined that the leading precursor of NO_x was NH3, but the thermodynamic factor did not change the dominant one. However, it will affect the path of precursor formation and change the proportion of components and the total yield. The order of its strength is: high temperature, high temperature, high temperature, low speed, low temperature, low temperature, low speed, low temperature, low temperature, low temperature, low temperature, low temperature, low temperature, low speed, Large particle size and low moisture content can reduce the total yield by 5- 11% and 4- 6, respectively. The fuel components affect the yield of NH_3, the difference of N structure at low temperature or slow speed makes PMWHTW; at high temperature and fast, the difference of ash element makes PMWHTW; the structure and N distribution of semi-coke are shown. Under typical pyrolysis conditions, the total yield is 20-45, which has nothing to do with the type of residue, which can provide reference for its clean utilization.
【作者单位】：中国科学院广州能源研究所中国科学院可再生能源重点实验室广东省新能源和可再生能源重点实验室;中国科学院大学;
【基金】：国家自然科学基金(51661145022;51676195)资助~~
【分类号】：X787

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